Model of integrated resistant variety spring wheat for soil-climatic conditions of the Kurgan region

Abstract

In the conditions of resource-saving or “zero” soil cultivation, when a mass of plant residues remains on the surface of the field, the phytosanitary situation for many leaf diseases of wheat, the primary infection of which hibernates on straw, as well as root rot, has become extremely aggravated. The complication of the phytosanitary situation, especially concerning septoria and pyrenoforosis, was also facilitated by the predominantly chemical strategy of plant protection. In this situation, the selection of wheat varieties for complex resistance to leading pathogens and unfavorable environmental factors acquires relevance. The introduction of new resistant varieties into the agroecosystem allows for a change in biological diversity, expansion of the ecological niche of antagonists, and the prevalence of the stabilizing type of natural selection in pathogen populations. In this regard, the work aimed to develop a conceptual model (idiotype) of a complex resistant wheat variety to the main pathogens with traits that are responsible for optimizing the relationship of plants with pests. The main objectives of the study were to identify the immunogenetic mechanisms of local spring wheat varieties that reduce the biotic potential of harmful organisms. and restraining the rate of their adaptive population variability; development of a conceptual model of a comprehensively resistant variety and methods for selecting resistant forms of plants. For the first time, an assessment of all immunogenetic barriers can effectively and long-term protect plants from the effects of infectious and non-infectious agents. unfavorable abiotic environmental factors, as well as the analysis of the information available in the scientific literature on the mechanisms and parameters of plant resistance, a conceptual model of a variety of soft spring wheat, was developed for the conditions of the Southern Trans-Urals with resistance to a complex of phytopathogenic fungi and moisture deficit. resistance should be focused primarily on pyramiding a block of resistance genes (polygenes) with the use of appropriate techniques, on the formation of complex resistance to stressors of different childbirth. Such models have no analogs since research in this direction in regional research institutes (Kurgan Research Institute of Agriculture, Chelyabinsk Research Institute of Agriculture, etc.) has not previously been carried out.